A boy covered himself with two layers of blanket on a cold winter night.
This helped him to keep himself warm because:

Friction between the layers of blanket produces heat

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Air trapped between the layers of blanket is a bad conductor of heat.

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Blanket becomes heavier.

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All of these

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Solution

The correct option is B Air trapped between the layers of blanket is a bad conductor of heat.
If we use two blankets, we feel warm because the air trapped between them acts as a barrier for heat transfer.

Air acts as an insulator or bad conductor of heat.

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Question 2

A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because:

(a) Friction between the layers of newspaper produces heat

(b) Air trapped between the layers of newspaper is a bad conductor of heat.

(d) Newspaper is at a higher temperature than the temperature of the surrounding.

On a given winter night, Himanshu has two options, either to use a single layer blanket or two layers of same blanket. Which option will keep him more warm?

Q. On a winter night, Himanshu has two options: either to use a single layer blanket or a double layered blanket. You will advise him to use:

Q. Assertion :Two thin blankets put together are warmer than a single blanket of double the thickness. Reason: Air gets trapped between two blanket which is a bad conductor of heat.

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A boy covered himself with two layers of blanket on a cold winter night. ​ This helped him to keep himself warm because:​

The correct option is B Air trapped between the layers of blanket is a bad conductor of heat.If we use two blankets, we feel warm because the air trapped between them acts as a barrier for heat transfer. ​ Air acts as an insulator or bad conductor of heat.​

A boy covered himself with two layers of blanket on a cold winter night.
This helped him to keep himself warm because:

The correct option is B Air trapped between the layers of blanket is a bad conductor of heat.
If we use two blankets, we feel warm because the air trapped between them acts as a barrier for heat transfer.

Air acts as an insulator or bad conductor of heat.